Fisheries Management and Ecology最新文献

{"title":"Genetic sex determination improves Canadian Atlantic salmon (Salmo salar) population assessments","authors":"Martha J. Robertson,&nbsp;Sarah J. Lehnert,&nbsp;Nicholas I. Kelly,&nbsp;Lorraine C. Hamilton,&nbsp;Ross A. Jones,&nbsp;Alex L. Levy,&nbsp;Rebecca Poole,&nbsp;Chantelle M. Burke,&nbsp;Steven J. Duffy,&nbsp;Amber Messmer,&nbsp;Ian R. Bradbury","doi":"10.1111/fme.12655","DOIUrl":"10.1111/fme.12655","url":null,"abstract":"<p>Estimating egg deposition for Atlantic salmon population assessments is made difficult by their lack of sexual dimorphism prior to the autumn spawning season. We quantified the effect of sex misclassification from subjective examination of external morphology on egg deposition estimates in four Atlantic salmon populations across multiple years. Sex classification of Canadian salmon using the genetic sex marker (<i>sd</i>Y) was accurate (&gt;97%), whereas sex classification based on subjective examination of external morphology was inaccurate, with misclassification rates dependent on sea age, life history, and sampling season. Sex misclassification led to annual egg deposition estimates that ranged from −36% to +56%. We found that sex could not be discriminated based on measures of external morphology.</p>","PeriodicalId":50444,"journal":{"name":"Fisheries Management and Ecology","volume":"31 1","pages":""},"PeriodicalIF":2.0,"publicationDate":"2023-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135060864","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"How does climate change affect small scale fisheries? A case study of the Lower Amazon in Brazil","authors":"Maura da Silva Costa Furtado,&nbsp;Joaquim Carlos Barbosa Queiroz,&nbsp;Bianca Bentes,&nbsp;Nelson de Almeida Gouveia,&nbsp;Marcus José Alves de Lima,&nbsp;Mauro Luis Ruffino,&nbsp;Victoria Isaac","doi":"10.1111/fme.12654","DOIUrl":"10.1111/fme.12654","url":null,"abstract":"<p>Effects of global climate change on inland artisanal fisheries have received little attention from scientists. We investigated fisheries of the Lower Amazon in Brazil using a wavelet analysis of a 13-year data series of fishery catches, environmental variables, and climatic indices, to determine how these variables affected catches of different species. The catch per unit of effort (CPUE) of gillnet and line fisheries increased over time. Relative humidity, latent heat, and sea surface temperatures influenced productivity of both fisheries. El Niño had a negative and immediate effect on gillnet CPUE, while its effect on line fishing was positive, with an eight month lag. Our findings indicate that fishery productivity was modulated by climate events, which influenced ecosystems and modified habitats and ecological niches, andthereby impacted fishery productivity.</p>","PeriodicalId":50444,"journal":{"name":"Fisheries Management and Ecology","volume":"31 1","pages":""},"PeriodicalIF":2.0,"publicationDate":"2023-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135396911","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Stocking fish in inland waters: Opportunities and risks for sustainable food systems","authors":"Ian G. Cowx,&nbsp;Simon J. Funge-Smith,&nbsp;Abigail J. Lynch","doi":"10.1111/fme.12656","DOIUrl":"10.1111/fme.12656","url":null,"abstract":"<p>Stocking is one of the foremost tools in the inland fisheries management toolbox, but it comes with both opportunities and risks. Stocking is often used as compensation for depleted wild populations, particularly where recruitment processes have been disrupted, but it can introduce disease, disrupt community structures, reduce genetic integrity, and cause conflicts between fishery stakeholders. Despite its widespread use, examples of effective stocking for food fisheries in inland waters are sparse in the peer-reviewed literature. Nevertheless, it is well established that stocking is frequently used to maintain fish yield, so there is a need to conduct the practice in a robust manner that minimises the potential risks. This paper serves as the front matter for a special section of <i>Fisheries Management and Ecology</i> focused on fresh waters feeding the world, which resulted from two panel sessions, one focused on aquaculture and one focused on stocking, hosted by the international InFish research network (https://infish.org/). The paper highlights current practices of fish stock enhancement in inland waters for food, examines potential synergies and interactions of stock enhancement programmes with aquaculture, and provides an outline framework for responsible management of fish stock enhancement.</p>","PeriodicalId":50444,"journal":{"name":"Fisheries Management and Ecology","volume":"30 6","pages":"555-563"},"PeriodicalIF":2.0,"publicationDate":"2023-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135397654","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Morphological differences between wild and hatchery-reared Bloater (Coregonus hoyi) from Lake Michigan, USA","authors":"Andrew E. Honsey,&nbsp;Yu-Chun Kao,&nbsp;Chris Olds,&nbsp;David B. Bunnell","doi":"10.1111/fme.12653","DOIUrl":"10.1111/fme.12653","url":null,"abstract":"<p>Coregonines (ciscoes and whitefishes) are economically, ecologically, and culturally important fishes that are distributed throughout the Northern Hemisphere. In the Laurentian Great Lakes, coregonines declined throughout the 19th and 20th centuries, and managers have prioritized their restoration. A key restoration tool is reintroduction via stocking. However, hatchery-reared coregonines can display different morphologies than wild fish, which could affect their fitness. Unfortunately, our understanding of these differences is limited because previous work did not adequately remove allometric effects in morphological analyses. We compared morphologies between wild and hatchery-reared Bloater (<i>Coregonus hoyi</i>) from the same stock using appropriate size corrections. Hatchery-reared fish had shorter heads, shorter dorsal fins, and shallower bodies than wild fish. Moreover, some characters differed across wild fish collections. Our results improve our understanding of how artificial rearing can impact coregonine morphology, and we recommend future studies on what causes these differences and whether they impact fitness.</p>","PeriodicalId":50444,"journal":{"name":"Fisheries Management and Ecology","volume":"31 1","pages":""},"PeriodicalIF":2.0,"publicationDate":"2023-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135395543","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Estimating lentic recreational fisheries catch and effort across the United States","authors":"Matthew D. Robertson,&nbsp;Stephen R. Midway,&nbsp;Holly S. Embke,&nbsp;Anna L. Kaz,&nbsp;Mitchel Lang,&nbsp;Craig Paukert,&nbsp;Nicholas A. Sievert,&nbsp;Lyndsie Wszola,&nbsp;Abigail J. Lynch","doi":"10.1111/fme.12650","DOIUrl":"10.1111/fme.12650","url":null,"abstract":"<p>Recreational fisheries represent a socially, ecologically, and economically significant component of global fisheries. The U.S. Inland Creel and Angler Survey Catalog (CreelCat) database includes inland recreational fisheries survey data across the United States to facilitate large-scale analyses. However, because survey methods differ, a statistical method capable of integrating these surveys is necessary to assess patterns and relationships across regions. Here, we developed a hierarchical generalized linear mixed modeling approach to estimate the relationship between daily recreational fisheries catch and effort based on waterbody, socio-economic, and ecological covariates. We applied this approach to CreelCat data on lentic waterbodies and found that recreational fisheries catch and effort were non-linearly related (i.e., catch per unit of effort declined as effort increased), where effort varied regionally and by waterbody area, median county age, and distance to nearest primary road. This modeling approach could be used to inform data-poor regions or waterbodies, make comparisons across spatial scales, and, with the inclusion of socio-economic and ecological factors, inform management techniques in an era of shifting demographics and landscapes.</p>","PeriodicalId":50444,"journal":{"name":"Fisheries Management and Ecology","volume":"31 1","pages":""},"PeriodicalIF":2.0,"publicationDate":"2023-08-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46569813","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Prioritizing bull trout recovery actions using a novel cumulative effects modelling framework","authors":"Laura M. MacPherson,&nbsp;Jessica R. Reilly,&nbsp;Kenton R. Neufeld,&nbsp;Michael G. Sullivan,&nbsp;Andrew J. Paul,&nbsp;Fiona D. Johnston","doi":"10.1111/fme.12649","DOIUrl":"10.1111/fme.12649","url":null,"abstract":"<p>Complexity of addressing cumulative effects that vary in space and time, especially for species occupying large ranges, makes conservation and recovery of populations difficult. In Alberta, declines of all three native stream trout species led to them being listed as species at risk. We developed a novel, semi-quantitative cumulative effects modelling process to quantify threats using stressor-response curves with a single common response scale, wherein inputs were determined for each population, and outputs were used to create population-specific recovery action hypotheses to inform management. Using a case study of bull trout recovery in Rocky Creek, Alberta, we tested these hypotheses using a before–after control-impacted design. Recovery actions positively affected bull trout, and the modelling approach provided insight into threats (sedimentation and angling effort) that most likely limited the population.</p>","PeriodicalId":50444,"journal":{"name":"Fisheries Management and Ecology","volume":"31 1","pages":""},"PeriodicalIF":2.0,"publicationDate":"2023-08-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/fme.12649","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47347781","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Corroborating otolith age using oxygen isotopes and comparing outcomes to scale age: Consequences for estimation of growth and reference points in northern pike (Esox lucius)","authors":"Timo D. Rittweg,&nbsp;Clive Trueman,&nbsp;Elias Ehrlich,&nbsp;Michael Wiedenbeck,&nbsp;Robert Arlinghaus","doi":"10.1111/fme.12646","DOIUrl":"10.1111/fme.12646","url":null,"abstract":"&lt;p&gt;Accurate age estimates are crucial for assessing the life-histories of fish and providing management advice, but validation studies are rare for many species. We corroborated age estimates with annual cycles of oxygen isotopes (δ&lt;sup&gt;18&lt;/sup&gt;O) in otoliths of 86 northern pike (&lt;i&gt;Esox lucius&lt;/i&gt;) from the southern Baltic Sea, compared results with visual age estimates from scales and otoliths, and assessed bias introduced by different age-estimation structures on von Bertalanffy growth models and age-structured population models. Age estimates from otoliths were accurate, while age estimates from scales significantly underestimated the age of pike older than 6 years compared to the corroborated reference age. Asymptotic length (&lt;math&gt;\u0000 &lt;semantics&gt;\u0000 &lt;mrow&gt;\u0000 &lt;msub&gt;\u0000 &lt;mi&gt;L&lt;/mi&gt;\u0000 &lt;mo&gt;∞&lt;/mo&gt;\u0000 &lt;/msub&gt;\u0000 &lt;/mrow&gt;\u0000 &lt;/semantics&gt;&lt;/math&gt;) was larger, and the growth coefficient &lt;math&gt;\u0000 &lt;semantics&gt;\u0000 &lt;mrow&gt;\u0000 &lt;mi&gt;k&lt;/mi&gt;\u0000 &lt;/mrow&gt;\u0000 &lt;/semantics&gt;&lt;/math&gt; was lower for scale ages than for corroborated age and otolith age estimates. Consequentially, scale-informed population models overestimated maximum sustainable yield (&lt;math&gt;\u0000 &lt;semantics&gt;\u0000 &lt;mrow&gt;\u0000 &lt;mi&gt;MSY&lt;/mi&gt;\u0000 &lt;/mrow&gt;\u0000 &lt;/semantics&gt;&lt;/math&gt;), biomass at &lt;math&gt;\u0000 &lt;semantics&gt;\u0000 &lt;mrow&gt;\u0000 &lt;mi&gt;MSY&lt;/mi&gt;\u0000 &lt;/mrow&gt;\u0000 &lt;/semantics&gt;&lt;/math&gt; (&lt;math&gt;\u0000 &lt;semantics&gt;\u0000 &lt;mrow&gt;\u0000 &lt;msub&gt;\u0000 &lt;mi&gt;B&lt;/mi&gt;\u0000 &lt;mi&gt;MSY&lt;/mi&gt;\u0000 &lt;/msub&gt;\u0000 &lt;/mrow&gt;\u0000 &lt;/semantics&gt;&lt;/math&gt;), relative frequency of trophy fish (&lt;math&gt;\u0000 &lt;semantics&gt;\u0000 &lt;mrow&gt;\u0000 &lt;mo&gt;≥&lt;/mo&gt;\u0000 &lt;mn&gt;100&lt;/mn&gt;\u0000 &lt;mspace&gt;&lt;/mspace&gt;\u0000 &lt;mi&gt;cm&lt;/mi&gt;\u0000 &lt;/mrow&gt;\u0000 &lt;/semantics&gt;&lt;/math&gt;), and optimal minimum length limit but underestimated fishing mortality at &lt;math&gt;\u0000 &lt;semantics&gt;\u0000 &lt;mrow&gt;\u0000 &lt;mi&gt;MSY&lt;/mi&gt;\u0000 &lt;/mrow&gt;\u0000 &lt;/semantics&gt;&lt;/math&gt; (&lt;math&gt;\u0000 &lt;semantics&gt;\u0000 &lt;mrow&gt;\u0000 &lt;msub&gt;\u0000 &lt;mi&gt;F&lt;/mi&gt;\u0000 &lt;mi&gt;MSY&lt;/mi&gt;\u0000 &lt;/msub&gt;\u0000 &lt;/mrow&gt;\u0000 &lt;/semantics&gt;&lt;/math&gt;). Using scale-based ages to inform management regulations for pike may therefore result in conservative management and lost yield. The overestimated asymptotic length may instill unrealistic expectations of trophy potential in recreational anglers targeting large pike, while the overestimation in MSY woul","PeriodicalId":50444,"journal":{"name":"Fisheries Management and Ecology","volume":"31 1","pages":""},"PeriodicalIF":2.0,"publicationDate":"2023-08-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/fme.12646","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46125998","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Stock assessment of Larimus breviceps, a bycatch species exploited by artisanal beach seining in Northeast Brazil","authors":"Lucas Santos,&nbsp;Jonas Vasconcelos-Filho,&nbsp;Leandro N. Eduardo,&nbsp;Alex Lira,&nbsp;Cecília Craveiro,&nbsp;Emanuell F. Silva,&nbsp;Flávia Lucena-Frédou","doi":"10.1111/fme.12647","DOIUrl":"10.1111/fme.12647","url":null,"abstract":"<p>Motorized trawling was banned off part of the Brazilian coast in 1990 due to environmental impacts, thus artisanal fishermen adopted large beach seines as an alternative. No impact assessments have been conducted on any species; therefore, we examined the life history and stock status of shorthead drum, <i>Larimus breviceps</i>, a primary bycatch in tropical shrimp fisheries. Between 2016 and 2017, 969 shorthead drum were collected and analyzed using ELEFAN-based models. Females were larger, more abundant, and older than males. Capture rates of juvenile were high, and no mega-spawners were found. Integrated stock assessment indicated slight overexploitation and growth overfishing. Increased yield per recruit was indicated by high length at first capture. Shorthead drum segregate ontogenetically by size. Growth, mortality, and longevity may be temperature-influenced. We found that beach seine fisheries may impact shorthead drum by population depletion and potential disruptions to reproductive capacity and recommend further studies and management to improve sustainability.</p>","PeriodicalId":50444,"journal":{"name":"Fisheries Management and Ecology","volume":"31 1","pages":""},"PeriodicalIF":2.0,"publicationDate":"2023-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49333026","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Using swim-up traps to assess Arctic charr (Salvelinus alpinus) spawning habitat and the phenology and density of emergent fry","authors":"Antony Smith,&nbsp;Nigel Milner,&nbsp;Alexander Papadopoulos,&nbsp;Mathew Seymour,&nbsp;Gary Carvahlo","doi":"10.1111/fme.12648","DOIUrl":"10.1111/fme.12648","url":null,"abstract":"<p>The Arctic charr (<i>Salvelinus alpinus</i>) is a species of cultural, economic and conservation importance, but hitherto, investigations of critical early life stages have been few. Here, at a lake in the United Kingdom, we used swim-up traps to investigate the phenology of fry emergence and associations between fry density and habitat. The first emergence occurred on 4 or 5 March 2020 and 2021, with numbers peaking and remaining stable in the following 2 weeks. Emergence in 2021 had finished by 27 March but on the same date in 2020 emergence was ongoing when COVID-19 ended sampling. Substrate particle size ranged 31–94 mm and was negatively correlated with fry density. Likewise, density was negatively correlated with water depth and aquatic plant cover, but there was no relationship with flow velocity. Traps were effective and non-destructive for assessing the location and productivity of spawning sites for this locally threatened species.</p>","PeriodicalId":50444,"journal":{"name":"Fisheries Management and Ecology","volume":"31 1","pages":""},"PeriodicalIF":2.0,"publicationDate":"2023-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/fme.12648","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42634832","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Patterns in longitudinal distribution of American Eel (Anguilla rostrata) population characteristics in rivers of Puerto Rico","authors":"A. Torres-Molinari,&nbsp;A. C. Engman,&nbsp;K. Pacifici,&nbsp;C. A. Dolloff,&nbsp;B. J. E. Myers,&nbsp;T. J. Kwak","doi":"10.1111/fme.12645","DOIUrl":"10.1111/fme.12645","url":null,"abstract":"<p>American Eel (<i>Anguilla rostrata</i>) population characteristics and distribution remain drastically understudied in the Caribbean region. We conducted the first island-wide study to evaluate the distribution of density, length, and sex in relation to distance from the mouth of 23 stream reaches in five rivers in Puerto Rico. We found 287 American Eel at a mean density of 156.7 fish/ha. Sex ratios favored females (52:3) but most of the eel sampled were undifferentiated or undetermined. Generalized linear modeling indicated that upstream habitats with low eel density were optimal environments for production of large and female eel. Our findings indicate that Puerto Rico could significantly contribute to the spawning population and strengthen knowledge of American Eel in the Caribbean. Our findings could be used to guide local and range-wide conservation efforts to ensure stream connectivity and access to optimal upstream habitat for survival of the population.</p>","PeriodicalId":50444,"journal":{"name":"Fisheries Management and Ecology","volume":"31 1","pages":""},"PeriodicalIF":2.0,"publicationDate":"2023-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/fme.12645","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48723513","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}